Looks like some sort of yellow tomato to me, and seemed like they had cultivated it there. So I, being curiously ignorant, had a little nibble. I have never, ever tasted anything more vile, and it took everything to keep from wretching right there ... and for the next 30 minutes hiking up the trail. When I asked, between gags, "how the hell can you eat that?!?" they laughed. "We never eat that." "Whay are you cultivating it here around the coffee?, asked I. "We like how it looks, but it has no use." Groan.